Sheet-glass-protecting means and method



Aug. 7, 1928. 1,680,227

L. MAM BOURG SHEET GLASS PROTECTING MEANS AND METHOD Filed Nov. l2, 1925 ATTDQNEV.

,iP-reed Aug. zil'azlf UNITED STATES essen? essieu.'

` leer, the sheet to means ,adapted being drawn `muy be doiected over suitable Lnorom or muenchen, enzo, salomon no ifi-1n Lrenny-owszuesm 'omas comm, or menno, onze, A couronnement on omo.`

u y exmenes-newseme' msm-femm emmen. l

.Application :nea november is, :ses invention relaxes to sheet.

'The present glass apparatus, and has particular reference toA prevent the surface of the sheet from becoming injured or marred.

An Important objecb'o ehe invention is to create a. nrotective betwenthe sheet of glnssbeing and those parts of the apparatus with which the sheet contacte.

Another object of .the nention 'is to rovde means of this. nature wherein e s from e mess of molten glass means to a horizontal plane where it muy be passed over flattening nfneens and through un annealing being protected against by means of a'sutsble mixture medium ce, marks which muy be applied tothe uppers tus itself or to the sheet object of the invention is to provde means wherehye continuous spray of be applied either direct-ly protective film may to the sheet being formed or the' apparatus with which the'sheet contacts the film being of u nature to prevent injurysio the sheet while at the'ssme time the lire polished finish lof the sheet will not be disturbed.

ther objects and advantages or' theinyfem tion will become apparent during the course of the following description.

In the drawings wherein like numerals are employed to designate like perte throughout the same,

Fig. 1 is a fragmentary transverse section through a portion of sheet glass apparatus, showingeone form of the invention in use,

Fig.' 2 is e fragmentary longitudinal section thereof, l Figa 3 is a sectional view through one form of applying means. and

Fig. 4 is a. view of'a slightly modified con:

` struction.

Although this invention can. be used with tiny' form of sheet glass apparatus, it is ilu.:- treted as being` used in connection with the Colburn type of machine-such as shown in the Colburn Patent No. 1248,889, granted December 4, 1917. In this potente sheet is continuously drown from a mass'- of molten glass ntaned in e draw pot which s replenished from u tank furnace. The sheet 1s drawn in a vertical nlane a slight distance,

after whichit is deccted over a suitable ber, passed over flattening and bending mem drawing table and then through an anmeet .semen no. sso.

ngleer. rlfhe sheet .s-somewhat lestic subject to 'surface' 'marking es it gasses oilrn the deilectlng or` bending roll over the (lz-nwl roble and 1n the forepsrt` of the leer. #The bending roll 1s usually formed from e heetresisting non-conosive metgxl as is the drew The leer rolls are usually poded h an outer surface of f n common -practice to swab the leer rolls and'bthez" parte of the machine with agrephie para mice solution which-n lts'usuul form comprsesgmphte, pero, mica and Ycylinder oil, the three when combined producing e colloidal solution. This mixture, when applied to the various -rts of the mselnne, prevents injury to t e sheet when 1n contact the said parts. How over, es m the Colburn machine, 'there are approximately 200 leer rogo, and ii is quite n problem to keep them `properly covered with this solution. The sneet is hottest et Y is in n relatively hot state and noticeably suhect to surface imnressione.

In the drawings, the numeral 5 colgantes the drawing cheminer of'a sheet producing apparatus and as shown in Fig'. 2, contains o drew table or the like 6. The Sheet 7, sftor passing from the draw table 6, is ntz-oduced Within the includes?. plurality of rotatable leerrolls 9 which support the sheet. .Arranged along the sides of the leer are openings 10 which may have s ociated therewith e closure member l1.

The graphite para mica solution muy he applied to the rolls and the sheet by means` of e svrav device which is designated in its entirety by the numeral 12. This spray device comprises n chamber 13 adapted to contain-s coolng'medium 1 4 supplied through e conduit l5. 'lhemircture is drawn through roll. etc. can automat/i :ixu'xeeline*A leer 8, which l cation duc to irregularities,

20 'trough which 'e length substantially Iof the sheet zppnmtus a'onduit 16 terminating :it one end in suitable supply'eontoner 17,'andnt the other end in the cisoher e nozzle 18; .Running centre-Hy through q is'a.' ipe 19 having connectionwith o. pi

compreed air may forced.' drawing the nera mica. solution through the conduit lli `and. out u on the rolls or sheet, as hos-heen set fort The oo ligmedium 14: is provided to prevent overheating of the device when it 1s intro- 'dn'oed in the hot end of the loer or around other portions of the e t`;is. to be'widerstoodvt is not-necessarlly limited params. Of course :it the spray device mixture lssues` fied to the extent `that'the elongated slot 21, preferably of through an to be moved during the-spraying oneretion. s is shown degrommnticnliy in Fig. 1; the nozzle 12 is supported by the conduite whieh suppl the mixture sind oir.

andt e like 22 may be provided to eontrol the )rossore and amount of mixture applied to t e vol-ions parts. i

In actuel u's the mixture Inuyeither be sprayed directly ponthe sheet' or upon the apparatus itself. The doposit may either be entirely continuous hv ineens of a very slow spraying, or if vit is esirecl :in intermittext spraying may befnod over so often, depend -ingopon the ro )id ity with which the sheet is produced,'the emperiitures,

)reventa surface demoreto. which may be.

finished sheet but will present on 'the asbestos: or bending roll. In the type of s mu; device sho-.vn in Fig. 4, 'a now/.le ore erebly provided for every member though it een he moved from 'place to place es desired.

t'is to be understood that thei'orm of the invention herewith' shownand described is to oe teken as the preferred embodiment of the seme, and that various changes init-he shape, size and arrangement of pm'tsmny be 'resorted to without spirit of the invention or subioined claims.

Claims: v y

1. ln sheet glass apparatus, means `for drawing al shoot from a mess of molten glass, and moans for spraying o. protective hn upon the sheet or parte of the glam oppuretus with which the sheetcontstc. 1

9.. ln shoot glass apparatus. menns for drawing a 1. sheet from e moss of molten glass,

und menus orcontinuousiy spraying it proteotve film between the sheet and portions with lwhich it com toets.

. 3. n sheet glasopporatos, means'. Aor

'.e dieoharge nozzle 18 to the type sllo'svv'nv 'in Fig. 3. In Fig. the construction is rnodil the same as the uclth of the sheet so that the nozzle will not here'l Various .valves 'drewing e sheet ete. The dope -or mixture will not ntie-ct- `the luster of the 'tween the sheet und. leer rolle, drow tebea to be sprayed, ol

consisting in' i departing from the the scope of the drawing s sheet from 'zt-mess of molten' glass, :und .means for spraying-n; 'grelitelm oetween the sheet and ports' of t with which the sheet eontocts; l Y

4. In sheet glass eppzzretus', ineens for drawing a sheet from e mess o imolten gloss, and means for spre 'ing e graphite para, mica solution upon-thosefsoreoes-olt the glnssvapparatus with which the sheet con toets. 5. In sheetgless spparatus,- means for. drawing e. sheet and means lfor ,spi'oyiog e. .protective ooiloidel solution upon those surfaces 'oi the apparatus .with 'which the sheet contacts.

6. 'in sheet glessepparetus, means for drawing' e sheet-from. e, me'szs`4 "of molten glass, a. spray deyioesdepted for eppging a. protective film o en .thet' surface of' e apporotos' with Whi :l1 the hot sheet contacta and ineens for preventing ,overheating of the spray devioe.'

'L' In she/eti glossepperetns, means for from :i mess' of 1nolten glass,` and o. )rey devie-assooietod with the son aoes o1 the apparatus with which the het sheet contacts and adapted for sprnying e graphite solution thereon.- i 8.111 sheet gloss drawing a. sheet from'. efiness of `molten glass,A e s ra device gissoeintedlwth the surfeoes o t e-npperotos with Whioh the hot sheet eolitwcts and adopted for spraying a. graphite solution thereomY and means for rerentng. overheotingof the spray device.v 9. The process of protecting sglass sheet consisting in sprnyng a. protectivelm bef formingopperatus mthl which it contracts. 10. The process of protecting a gloss sheet, consisting in intel-posing o. graphite soin# tion l'zotweenthe -sheet heet forming apparatus with which it conaets. f ll. The process of protecting e. glass sheet.

nte-musing o colloidal soin-I tion between the sheets and portions of the sheet forming apparatus with whieh'the sheet contacts.

12: The Process of protecting o,- glaessheet, consista 111 spraying a between formino apparatus with which it contacts. 1.8. 'fhe'process of protecting e glass sheet; consisting` in spraying a colloidal solution between the sheet and portions of the sheet forming apparatus with 'whoh the sheet contacts. f' i4. rEhe process of protecting a 'hot-glass sheet, consisting in n plyinfr o grophite solo? tion upon those musees o? the sheet orming apparatus with which. the hot sheet oontoets.

15. The process of. protesting a. 'hot glass sheet., consisting. in spraying o colloidal solo` rthe. sheet :mgl portions oi the sheet evep'peratus y from@ mess-oi molten' glass,

epperetos. means for rtions of 'the n'lzeet imi and oortionso the graphite solution 

